Yokohama Rubber Co. Ltd. (TYO:5101) has added three new sizes to the lineup of its Advan A08B Spec G series of gymkhana racing tires, making these available on Oct. 2. The new sizes are 235/40R18 95W, 215/45R17 91V and 225/45R17 94V. Launched just last month, the Advan A08B Spec G is based on the Advan A08B, a street radial tire…